Rockwell SLC 500 · Compact CPU
Rockwell 1747-L552
Normal sale of the 1747-L552 has ended. Spares may still be available, but the clock is running.
- Active RolloutSold and supported normally
- Phase OutRetirement announced, still orderable
- CancellationNormal sale ended, spares may remain
- Total DiscontinuationNo manufacturer supply or repair
Is the Rockwell 1747-L552 discontinued?
On ECS's lifecycle assessment, the 1747-L552 has been cancelled: no longer sold as a current product, though spares may remain available for a period.
Source: ECS lifecycle assessment, based on ECS's internal lifecycle data in Command Centre. Last checked . Always confirm a specific part's status with the manufacturer before buying or planning a migration.
What Cancellation means for you
You can no longer order it as a normal product, and nothing new should be designed around it. If machines depend on it, you want spare stock you can rely on and a migration plan. Both start with knowing how many you run and whether each has a backup.
Before replacing a PLC processor
We would secure a current, tested PLC program backup, record the programming software and version, and map the I/O, networks and intelligent modules connected to the controller.
CPU migrations can alter addressing, communications, memory behaviour or firmware requirements, so a newer processor in the same general family is not automatically a drop-in replacement. Proving that the program can actually be restored while the existing controller still runs is one of the most valuable checks a maintenance team can make.
ECS engineering guidance
1747-L552 part details
- Manufacturer
- Rockwell Automation
- Range
- SLC 500
- Name
- 746 SLC System, SLC 5/05 Controller - 32K Memory
- Summary
- The 1747-L552, manufactured by Allen-Bradley, is a central processing unit (CPU) that is part of the SLC500 series. This CPU features 32K of memory and supports Ethernet networking, essential for modern industrial automation systems. Its robust construction and reliable performance make the 1747-L552 an excellent choice for project managers and production supervisors seeking more efficient control solutions for their production line or manufacturing process. Discontinued March 31 2024
- Programming software
- RS Logix 5000
- Software versions
- Held in Command Centre, matched to firmware
Common questions about the 1747-L552
Is the Rockwell 1747-L552 discontinued?
On ECS's lifecycle assessment, the 1747-L552 has been cancelled: no longer sold as a current product, though spares may remain available for a period.
Can I still buy a 1747-L552?
Not as a normal new product. Remaining distributor stock or designated spares may still be available. Buy any you need now.
How do I back up a 1747-L552?
It is programmed with RS Logix 5000. The exact software version and cable depend on the unit's firmware. ECS records both for every unit it captures, alongside a verified backup.
With a backup, a failed unit is hours. Without one, it is days.
A Capture audit finds every 1747-L552 on your site, takes a backup of each one it can reach, and records the software version and cable needed to restore it. When a discontinued unit fails and a replacement turns up, the program is ready to load.
- Every device located, photographed and lifecycle-checked
- Backups taken on the day, with software version and cable recorded
- Findings report, plus a populated Command Centre
- No production downtime
Other SLC 500 parts
- 1746-NR8 Rockwell SLC 500 · Analogue Input Module Cancellation
- 1746-OB32E Rockwell SLC 500 · Digital Output Module Cancellation
- 1746-NR4 Rockwell SLC 500 · Analogue Input Module Cancellation
- 1747-SN Rockwell SLC 500 · Remote IO Header Module Cancellation
- 1747-L531 Rockwell SLC 500 · Modular CPU Cancellation
- 1747-SDN Rockwell SLC 500 · PLC - Communication Module - Serial (Programmable) Cancellation